/Engine/Plugins/Experimental/TextToSpeech/Source/TextToSpeech/Public/TextToSpeechEngineSubsystem.h
Activates a text to speech channel to accept requests to perform text to speech functionality. If the provided channel Id does not exist, nothing will happen.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=TextToSpeech) void ActivateChannel ( [FName](API\Runtime\Core\UObject\FName) InChannelId )